Question: What are the geological supereon which start with the letter precambrian
Paraphrase: What are the topographical supereon which begin with the letter precambrian
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q15398983 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'precambrian')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Precambrian, Precambrian